.bb{
	box-sizing:border-box; /* css3 rec */
    -moz-box-sizing:border-box; /* ff2 */
    -ms-box-sizing:border-box; /* ie8 */
    -webkit-box-sizing:border-box; /* safari3 */
    -khtml-box-sizing:border-box; /* konqueror */
	behavior:url("boxsizing.htc");
}
